Data migration with the help of EMC-SRDF

[emc101]

Hi,

We need to migrate data from EMC symmetrix DMX1000 to DMX2000. EMC is helping us by using SRDF. 15 open system hosts need to be migrated (HP-UX with cluster & windows-2k)

we are planing to follow below steps.

1. attach new DMX2000 to the existing SAN (consist of two mcdata switchs ED-64 and host with powerpath configuration)
2. Create new zones for both host HBA paths (zone between existing host HBA and new DMX2000 FA's)
3. Allocate similer no. of new DMX2000 disks to every host.
4. with the help of SRDF EMC will migrate data from DMX1000 to DMX2000 without disturbing any thing in production.
5. Discover new DMX2000 disks on every host.
6. After getting volume group map file and other env data export vg on HP host.
7. As host is seeing disks from DMX1000 & DMX2000 before importing vg on DMX2000 disks use "vgchgid" on all DMX2000 disks.
8. Import all volume groups on new DMX2000 disks.
9. Once every thing is tested on new DMX2000 disks deactivate old zone of DMX1000.

I need confirmation on following

* Will above procedure work smoothly in HP-UX cluster env.
* What additioal steps needed for HP cluster.
* please add any comment and suggestions

Thanks.

[Geoff Wild]

SRDF - usually done to remote sites - if you have room in your volume groups, why not just add the new disks to them, then use mirror/ux? That way - zero down time...

Doing above will require an outage - but will work...

As far as cluster - how mant nodes? if 2, then the devs will change - hence new cluster lock device and therfore need to cmapplyconf again.

Rgds...Geoff

[emc101]

Thanks Geoff,

we are planning to have downtime.

Our environment has 2 node HP cluster.

I do not have much exposure in cluster. For above procedure can you provide me the steps related to cluster with exact commands.

With Regards,

emc101

[emc101]

Hi Forum members,

I appreciate your suggestions on my above procedure.

Thanks.

emc101

[Sundar_7]

this is how you can change the cluster lock disk configuration in a cluster

# cd /etc/cmcluster
# cmgetconf -v -c .conf

# vi .conf
FIRST_CLUSTER_LOCK_PV /dev/........
#

Edit the .conf file and change the FIRST_CLUSTER_LOCK_PV to reflect the new device files

# cmcheckconf -v -C .conf

# cmapplyconf -v -C .conf

- Sundar.